#3700df
a dark, electric blue · warm · closest name: blue
RGB
55, 0, 223
HSL
255°, 100%, 44%
CMYK
75, 100, 0, 13
Luminance
0.0614
Every format
| HEX | #3700df |
| RGB | rgb(55, 0, 223) |
| HSL | hsl(255, 100%, 44%) |
| CMYK | cmyk(75%, 100%, 0%, 13%) |
| LAB | lab(29.8 72.3 -93.9) |
| LCH | lch(29.8 118.5 307.6) |
| OKLCH | oklch(0.428 0.272 273.9) |
Copy-ready code
/* CSS */
color: #3700df;
background-color: #3700df;
/* Tailwind (arbitrary) */
class="text-[#3700df] bg-[#3700df]"
/* SCSS */
$brand: #3700df;
/* SwiftUI */
Color(red: 0.216, green: 0.000, blue: 0.875)
/* Android */
Color.parseColor("#3700df")Accessibility — WCAG contrast
Aa
#3700df on white: 9.43:1
AA ✓ pass · AA-large ✓ · AAA ✓
Aa
#3700df on black: 2.23:1
AA ✗ fail · AA-large ✗ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red21.6%
Green0.0%
Blue87.5%
CMYK percentages
Cyan75.3%
Magenta100.0%
Yellow0.0%
Key (black)12.5%
Color previews
#3700df text on a black background
contrast 2.23:1
Card sample
#3700df text on a white background
contrast 9.43:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #3700df;
Background color
Panel with #3700df background
background-color: #3700df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #3700df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(55, 0, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(55, 0, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3700df; background: linear-gradient(135deg, #3700df, #CC00DF);